[ka-Map-users] Re: selection sets

[neuhausr at bitstream.net]

Alistair,

The ka-explorer demo page has a polygon query (countries)
http://www.ominiverdi.org/ka-map/ka-map/htdocs/index.html

Links to more apps
http://ka-map.ominiverdi.org/wiki/index.php/Links_to_some_ka-Map_applications

Also, I'm not sure if you've looked at the following pages on the ka-map
wiki yet, but if not, they may be helpful.  The Query page explains how to
use Templates with Mapserver queries.

http://ka-map.ominiverdi.org/wiki/index.php/Query
http://ka-map.ominiverdi.org/wiki/index.php/What_is_ka-Map_and_why_would_I_want_to_use_it%3F

I mention this second one because though I like ka-map, it wasn't the
right fit for my current needs (mainly because of the tiling).

Cheers,
Brad

>
> To be honest I haven't worked too much with the ka-map query system,
> especially with vector data.  However, I do plan on working on this soon.
>
> What you've described actually sounds fairly easy to implement.  Mapserver
> takes care of selecting the objects that fall within the bounding box
> given
> and returns the attributes of the results (I believe).  So ka-map is
> actually just allowing you to define the rectangle and it sends that
> rectangle to Mapserver which executed the query.
>
> I suggest you check out 2 things:
> First, Mapserver's documentation of its query system.
> Second, take a look at map_query_float.php in the ka-map source.  It takes
> the query bounding box as arguments, makes the mapserver call, and then
> echoes the results to an HTML div waiting for the reply.
>
> Hope it works!  We'll all love to see the app you come up with!
>
> Sam
>
>
>
> On 9/18/07, Fox, Alistair D (SKM) <AFox at skm.com.au> wrote:
>>
>>  Thanks Sam,
>>
>> I would assume if you can do a query on point data then line and polygon
>> data would be the same. Just a few techy questions. I gather to be able
>> to
>> do this the source data would need to be served out from a mapserver
>> instance. Are there any examples of this out on the web. I'm yet to see
>> any.
>> On a scale of 1-10 how difficult would it be to develop what my client
>> is
>> after. Eg: draw rectangle and select spatial objects (point/ line /
>> poly)
>> and then return attributes of selection for further manipulation.
>>
>> Alistair
>>
>>  ------------------------------
>> *From:* Samuel Hiatt [mailto:samhiatt at gmail.com]
>> *Sent:* Tuesday, 18 September 2007 12:50 AM
>> *To:* Fox, Alistair D (SKM)
>> *Cc:* ka-map-users at lists.maptools.org
>> *Subject:* Re: [ka-Map-users] selection sets
>>
>> Hi there Alistair!
>>
>> Yes!  ka-map is the answer to all your problems!  :p  You can definitely
>> do a query on point data with a rectangle bounding box.  I couldn't help
>> you
>> too much with the details of it as I work mainly with raster data at
>> this
>> point, but there are plenty of us around here who would be happy to help
>> you
>> get kamap set up and running!
>>
>> Sam
>>
>>
>>
>>
>> On 9/16/07, Fox, Alistair D (SKM) <AFox at skm.com.au> wrote:
>> >
>> >  Hi. I'm a newbie to Ka-map and are looking to confirm potential
>> > functionality for a client. From what i have seen so far this is an
>> > execellent project.
>> >
>> > One of the requirements my client has is the ability to do the normal
>> > GIS function of dragging a rectangle over the map and be able to
>> select the
>> > features that are within that area. Then the ability to working with
>> this
>> > selection set. e.g: display attributes about the features.
>> >
>> > What i need to know is can you do this at the moment, (i havn't seen
>> any
>> > examples) and if not is it possible with some customisation.
>> >
>> > Hope someone out there can help.
>> >
>> > Alistair
>> >
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>> future for all. Please consider the environment before printing this
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>> Notice - This message contains confidential information intended only
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>> the transferred information and should advise us immediately upon
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>> any discrepancy.
>> All email sent to SKM will be intercepted, screened and filtered by SKM
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